VIEWPOINT
ALL FIRED UP FOR SAFETY SALES
David Moore, CEO of the Bond It Group
EFFECTIVE PERFORMANCE is everything when it comes to fire safety products. However, without knowing it, many of us could be making compromises when it comes to our choice of fire foams and fire rated silicones. As a company that makes sealants, adhesives and other building chemicals, you might expect us to advocate increased awareness when it comes to choosing fire foams. But self-gain never has, and never will, be Bond It’s main motivation for urging greater consideration when it comes to these products. Instead, we believe the building industry in the UK is affected by a serious issue with equally serious, and potentially life-threatening, implications. There has been a number of
high profile examples of poor building practices contributing to the spread of fire and, with lives at stake, we see it as our responsibility to share our knowledge. The problem stems from the existence of too many different but similar sounding classification systems. This has created a degree of confusion which has left many in the sector at risk of inadvertently using fire foams with levels of performance that fall woefully short of the mark. Years ago specifying a fire foam was a lot simpler and arguably safer than it is today. You had the choice of either a standard foam or a fire foam with both types available in either a gun or handheld form. To benefit from its classification,
fire foam had to comply with BS476 part 20. This meant it would act as a barrier to fire for 4 hours giving a building’s occupants vital time to escape. Then, with an influx of
European foams into the UK 14 “
We believe the building industry in the UK is affected by a serious issue with equally serious and potentially life-threatening implications.
Yes, there are savings and profits to be made, but at the end of the day, what price do you put on property or even more poignantly, on someone’s life? As we near the 4th anniversary of the Grenfell Tower fire, we are hoping lessons have been learnt.
Like most of our competitors, ”
came a proliferation of different standards. The most widespread was a German standard based on a sliding scale. This ranged from A1 (100% non-combustible) through to A2, B1, B2 and B3 with the latter offering the worst levels of performance. If the introduction of a whole new standard system and a large number of differing classifications didn’t serve to create enough confusion, the way of assessing the UK and European standards was also totally different. The UK standard meant a fire foam had to act as a barrier to prevent fire transferring from one room to another for a period of four hours. The German standard meanwhile was based on someone trying to ignite the foam itself - not a very realistic scenario. One of the most widely seen classifications people now find on fire foams is B2, which strikes a balance between offering some fire resistance and at a cost that won’t hurt budgets – or margins. However, in our opinion, B2
‘fire’ foam’s performance is totally inadequate and we don’t think it should be sold as fire foam at all.
we react to market demand and do supply a B2 PU foam as part of our range. However, we are strict about this not being referred to as a “fire” foam and it is not marketing under this guise at all. We clearly state what the products performance characteristics are and what it is tested to. We would, however, in every fire sensitive situations, where linear gaps or service penetrations are to be sealed, only recommend using our Premiere B1 Fire Resistant Foam, which has been fully tested as an efficient seal against smoke and gas, providing up to 240 minutes fire resistance, which comes in 750ml gun and aerosol versions. Silicone sealants also play a big part in ensuring the integrity of fire resistant seals and joints. These are used in re-establishing the fire-rated integrity of a wall or floor assembly compromised by the inclusion or exclusion of a penetrant. Flames and smoke can spread through the smallest of gaps causing extreme damage to buildings and even human lives. Applying an intumescent sealant to linear joints, around pipes and between cables to close all the gaps and add fire resistance. An intumescent seal slows down the burning process and does not contribute to spread of flames. Therefore, it can minimize the damage by protecting structures, giving fire fighters more time to arrive and take the fire under control as well as fireproofing escape routes
allowing for efficient evacuation. Intumescent seals are known as means of passive fire protection. Also known as expansion sealant, intumescent sealant expands when it becomes exposed to extreme heat, up to 40 times its original volume. The sealant increases in volume but decreases in density forming a char layer. The expanded sealant does not actually catch fire, but the char burns eventually, still much more slowly than most building materials. Depending on the product formulation, application and backing material, an intumescent sealant can be resistant to fire for up to 4 hours. Buildings require different levels of fire resistance depending on their size and whether they have a residential purpose.
Better safe than sorry Of course, it would be remiss of Bond It to highlight an issue as grave as current fire foam classification and misclassification without proposing a solution. In its simplest terms, our advice would in every circumstance if you need fire protection from your foams nothing less than B1 is really acceptable as a bare minimum standard (and normally coloured light pink) and for silicones we would recommend a fire tested sealant, such as Bond Its FS4 silicone which is available in EU3 and EU9 cartridges and 600ml foil versions. Look for the standards EN1366-4, EN1366-3, EN ISO 10140-2 and EN13501-2 on packs - which are proof that the foams and sealants will do their job, and have been certified to do so, leaving you safe in the knowledge that you’ve chosen a true fire foam or fire rated sealant that will leave people safe in their homes, offices and other buildings. BMJ
www.buildersmerchantsjournal.net June 2021
VIEWPOINT
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